If you receive reports of visitors unable to login when visiting from an iOS device running any version of iOS 8, please submit a support ticket requesting that cookie deduplication be applied to the affected domain.

Mobile Safari on iOS 8 incorrectly saves the cookies returned when SPDY is used for the application protocol and a response contains two cookies of the same name but different values. Some CMS, like Magento, send cookies in this manner. Ideally, this should be corrected in the client or on the server, but Cloudflare is in a unique position to correct this behavior as we exist between the two.